Consistent localizer captures

摘要

Systems and methods for accurately converting angular localizer data into rectilinear localizer data thereby allowing for improved localizer capture performance and stability. The systems and methods utilize information onboard an aircraft regarding the aircraft's current position and the destination runway's position to more accurately determine a distance measurement for converting angular deviations into rectilinear deviations.

主权项

1. A method for guiding an aircraft during a final approach towards a runway, the method comprising:
receiving a geographic position of the aircraft; receiving a geographic position of a runway threshold of the runway; receiving a runway azimuth of the runway; computing a distance from the aircraft to the runway threshold utilizing the geographic position of the aircraft and the geographic position of the runway threshold; computing a bearing to the geographic position of the runway threshold utilizing the geographic position of the aircraft and the geographic position of the runway threshold; projecting the distance from the geographic position of the aircraft to the geographic position of the runway threshold into an along runway component and a cross runway component utilizing the runway azimuth of the runway; determining a distance from the geographic position of the runway threshold to a geographic position of a localizer transmitter; computing a distance geographically along the runway from the geographic position of the aircraft to the geographic position of the localizer transmitter utilizing the distance from the geographic position of the runway threshold to the geographic position of the localizer transmitter; converting an angular localizer deviation into a rectilinear localizer deviation utilizing, in part, the distance along the runway from the geographic position of the aircraft to the geographic position of the localizer transmitter; and providing the rectilinear localizer deviation to a guidance system for guiding the aircraft during the final approach towards the runway.